Add university-extension trials: Illinois VT + Iowa ICPT + Ohio OCPT (+123 cross-vendor trial docs) (#19)

Co-authored-by: claude <claude@jpaul.io> Co-committed-by: claude <claude@jpaul.io>
2026-06-10 08:36:19 -04:00
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+# Corn yield trial — University of Illinois VT, Region 3, IL 2025
+
+- **Publisher:** University of Illinois Variety Testing (independent cross-vendor trial)
+- **Crop:** Corn
+- **State:** IL
+- **Year:** 2025
+- **Region:** Region 3
+- **Rotation:** corn following soybean
+- **Cooperator / host:** Luke Merritt
+- **County:** Pike
+- **Sites:** Perry, Urbana
+- **Soil type:** Clarksdale silt loam
+- **Tillage:** Field cultivator
+- **Planted:** 2025-04-24
+- **Harvested:** 2025-09-23
+- **Source XLSX:** https://vt.cropsci.illinois.edu/wp-content/uploads/2025/11/Region-3-CornTable-2025.xlsx
+- **Index page:** https://vt.cropsci.illinois.edu/corn/
+
+---
+
+## Results (ranked by regional yield)
+
+| Rank | Brand | Product | Traits | Yield | Moisture | Lodging | Maturity |
+|---|---|---|---|---|---|---|---|
+| 1 | Sun Prairie Seeds | SP2820 TRE | GT:CL HT:G IST:M | 255.53 | 16.78 | 1 | 112 |
+| 2 | Burrus | 5C11 PCE | GT:C HT:B IST:M | 252.61 | 16 | 0.83 | 110 |
+| 3 | Prairie | 7241 | - | 250.9 | 16 | 0.83 | 112 |
+| 4 | Burrus | 8K34 VT2P | GT:C HT:G IST:M | 248.23 | 19.28 | 0.17 | 116 |
+| 5 | Prairie | 8864/8861 | - | 245.35 | 15.85 | 0.83 | 114 |
+| 6 | Whisnand | WH403TRE | GT:C2L HT:G IST:L | 244.74 | 17.32 | 0.67 | 115 |
+| 7 | Whisnand | WH402VT2P | GT:C2L HT:G IST:L | 241.91 | 18.02 | 1 | 114 |
+| 8 | Burrus | Power Plus 6G88 VE | GT:CR HT:B IST:M | 239.88 | 15.77 | 0.83 | 113 |
+| 9 | Sun Prairie Seeds | SP2821 TRE | GT:CL HT:G IST:M | 239.77 | 17.13 | 0.83 | 114 |
+| 10 | Prairie | 7445 | - | 239.67 | 16.35 | 0.67 | 113 |
+| 11 | Burrus | Power Plus 7R68 VE | GT:CR HT:B IST:M | 237.3 | 15.37 | 0.67 | 115 |
+| 12 | Sun Prairie Seeds | SPX2542 SSP | GT:CR HT:B IST:M | 234.61 | 15.68 | 0.33 | 109 |
+| 13 | Whisnand | WH303VT2P | GT:C2L HT:G IST:L | 232.64 | 17.27 | 2.33 | 115 |
+| 14 | Prairie | 6755 | - | 232.42 | 15 | 0.17 | 110 |
+| 15 | Prairie | 8786 | - | 232.38 | 17.27 | 0.33 | 115 |
+| 16 | Burrus | 7B14 PCE | GT:C HT:B IST:M | 229.92 | 14.8 | 1.33 | 114 |
+| 17 | Prairie | 6854 | - | 229.81 | 13.77 | 0.33 | 110 |
+| 18 | Prairie | 6436 | - | 229.46 | 15.23 | 0.33 | 111 |
+| 19 | Prairie | 4991 | - | 227.77 | 14.17 | 0.5 | 106 |
+| 20 | Whisnand | WH304SS | GT:CRL HT:B IST:L | 226.74 | 15.58 | 0.83 | 112 |
+| 21 | Prairie | 6854 | - | 223.64 | 13.72 | 0.17 | 110 |
+| 22 | Burrus | Power Plus 4V73AM | GT:C HT:B IST:M | 222.33 | 14.05 | 0.17 | 109 |
+| 23 | Prairie | 4556 | - | 221.65 | 13.4 | 0.33 | 104 |
+| 24 | Prairie | 5994 | - | 216.25 | 14.73 | 0.17 | 108 |